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      	<span class="token operator">...</span>
        <span class="token comment">// 分割代码块</span>
        <span class="token literal-property property">splitChunks</span><span class="token operator">:</span> <span class="token punctuation">{</span>
            <span class="token literal-property property">chunks</span><span class="token operator">:</span> <span class="token string">'all'</span><span class="token punctuation">,</span>
            <span class="token comment">/**
             * initial 入口chunk，对于异步导入的文件不处理
                async 异步chunk，只对异步导入的文件处理
                all 全部chunk
             */</span>

            <span class="token comment">// 缓存分组</span>
            <span class="token literal-property property">cacheGroups</span><span class="token operator">:</span> <span class="token punctuation">{</span>
                <span class="token comment">// 第三方模块</span>
                <span class="token literal-property property">vendor</span><span class="token operator">:</span> <span class="token punctuation">{</span>
                    <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'vendor'</span><span class="token punctuation">,</span> <span class="token comment">// chunk 名称</span>
                    <span class="token literal-property property">priority</span><span class="token operator">:</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token comment">// 权限更高，优先抽离，重要！！！</span>
                    <span class="token literal-property property">test</span><span class="token operator">:</span> <span class="token regex"><span class="token regex-delimiter">/</span><span class="token regex-source language-regex">node_modules</span><span class="token regex-delimiter">/</span></span><span class="token punctuation">,</span>
                    <span class="token literal-property property">minSize</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>  <span class="token comment">// 大小限制</span>
                    <span class="token literal-property property">minChunks</span><span class="token operator">:</span> <span class="token number">1</span>  <span class="token comment">// 最少复用过几次</span>
                <span class="token punctuation">}</span><span class="token punctuation">,</span>

                <span class="token comment">// 公共的模块</span>
                <span class="token literal-property property">common</span><span class="token operator">:</span> <span class="token punctuation">{</span>
                    <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'common'</span><span class="token punctuation">,</span> <span class="token comment">// chunk 名称</span>
                    <span class="token literal-property property">priority</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token comment">// 优先级</span>
                    <span class="token literal-property property">minSize</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>  <span class="token comment">// 公共模块的大小限制</span>
                    <span class="token literal-property property">minChunks</span><span class="token operator">:</span> <span class="token number">2</span>  <span class="token comment">// 公共模块最少复用过几次</span>
                <span class="token punctuation">}</span>
            <span class="token punctuation">}</span>
        <span class="token punctuation">}</span>
      <span class="token operator">...</span>
    <span class="token punctuation">}</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br></div></div><h3 id="动态数据-懒加载"><a href="#动态数据-懒加载" class="header-anchor">#</a> 动态数据-懒加载</h3> <div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token keyword">import</span><span class="token punctuation">(</span><span class="token string">'**'</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token parameter">res</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
	res<span class="token punctuation">.</span>default<span class="token punctuation">.</span><span class="token operator">**</span> <span class="token comment">// 注意default</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><h2 id="module-chunk-bundle-的区别"><a href="#module-chunk-bundle-的区别" class="header-anchor">#</a> module chunk bundle 的区别</h2> <p><img src="https://cdn.jsdelivr.net/gh/izhaong/izhaong.com-oss/blogImg/%E9%AB%98%E7%BA%A7%E4%BD%BF%E7%94%A8/2022/06/10/19-35-04-794c3cb9f560908370c443ac0dc7a47d-image-20220610165948317-e8419a.png" alt="image-20220610165948317"></p> <ul><li>module- 各个源码文件，webpack 中一切皆模块</li> <li>chunk - 多模块合并成的，如 entry import splitChunk</li> <li>bundle- 最终的输出文件</li></ul> <h2 id="webpack-性能优化-构建速度"><a href="#webpack-性能优化-构建速度" class="header-anchor">#</a> webpack 性能优化 - 构建速度</h2> <h3 id="优化-babel-loader"><a href="#优化-babel-loader" class="header-anchor">#</a> 优化 babel-loader</h3> <div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token punctuation">{</span>
    <span class="token literal-property property">test</span><span class="token operator">:</span>八<span class="token punctuation">.</span>js$<span class="token operator">/</span>，
    <span class="token literal-property property">use</span><span class="token operator">:</span> <span class="token punctuation">[</span>&quot;babel<span class="token operator">-</span>loader<span class="token operator">?</span>cacheDirectory'<span class="token punctuation">]</span>，<span class="token comment">//开启缓存</span>
    <span class="token literal-property property">include</span><span class="token operator">:</span> path<span class="token punctuation">.</span> reso <span class="token function">lve</span><span class="token punctuation">(</span>dirname<span class="token punctuation">,</span>'src&quot;），<span class="token comment">//明确范围</span>
    <span class="token comment">//// 排除范围，include 和 exclude 两者选一个即可</span>
    <span class="token comment">// exclude: path. resolve(_dirname,'node_ modules&quot;)</span>
<span class="token punctuation">}</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><h3 id="ignoreplugin-避免引入无用模块"><a href="#ignoreplugin-避免引入无用模块" class="header-anchor">#</a> IgnorePlugin 避免引入无用模块</h3> <ul><li><code>import moment from 'moment'</code></li> <li>默认会引入所有语言 JS代码，代码过大</li> <li>如何只引入中文？</li></ul> <div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token comment">// webpack.prod.js</span>

<span class="token comment">//忽略 moment 下的 / Locale 目录</span>
<span class="token keyword">new</span> <span class="token class-name">webpack<span class="token punctuation">.</span>Ignoreplugin</span><span class="token punctuation">(</span><span class="token regex"><span class="token regex-delimiter">/</span><span class="token regex-source language-regex">\.\/locale</span><span class="token regex-delimiter">/</span></span><span class="token punctuation">,</span> <span class="token regex"><span class="token regex-delimiter">/</span><span class="token regex-source language-regex">moment</span><span class="token regex-delimiter">/</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p><img src="/Users/izhaong/izhaong/Blog/izhaong.com-localFile/%E9%AB%98%E7%BA%A7%E4%BD%BF%E7%94%A8/image-20220610171412874.png" alt="image-20220610171412874"></p> <h3 id="noparse-避免重复打包"><a href="#noparse-避免重复打包" class="header-anchor">#</a> noParse 避免重复打包</h3> <p><img src="https://cdn.jsdelivr.net/gh/izhaong/izhaong.com-oss/blogImg/%E9%AB%98%E7%BA%A7%E4%BD%BF%E7%94%A8/2022/06/10/19-35-11-1034e4eb45ecac4cd127ad8d77c43e93-image-20220610171542388-7fffbd.png" alt="image-20220610171542388"></p> <h3 id="happypack-多进程打包"><a href="#happypack-多进程打包" class="header-anchor">#</a> happyPack 多进程打包</h3> <ul><li>JS单线程，开启多进程打包</li> <li>提高构建速度（特别是多核 CPU)</li></ul> <div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token comment">// module.rules</span>
  <span class="token comment">// js</span>
  <span class="token punctuation">{</span>
      <span class="token literal-property property">test</span><span class="token operator">:</span> <span class="token regex"><span class="token regex-delimiter">/</span><span class="token regex-source language-regex">\.js$</span><span class="token regex-delimiter">/</span></span><span class="token punctuation">,</span>
      <span class="token comment">// 把对 .js 文件的处理转交给 id 为 babel 的 HappyPack 实例</span>
      <span class="token literal-property property">use</span><span class="token operator">:</span> <span class="token punctuation">[</span><span class="token string">'happypack/loader?id=babel'</span><span class="token punctuation">]</span><span class="token punctuation">,</span>
      <span class="token literal-property property">include</span><span class="token operator">:</span> srcPath<span class="token punctuation">,</span>
      <span class="token comment">// exclude: /node_modules/</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br></div></div><div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token comment">// plugins</span>
<span class="token comment">// happyPack 开启多进程打包</span>
<span class="token keyword">new</span> <span class="token class-name">HappyPack</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    <span class="token comment">// 用唯一的标识符 id 来代表当前的 HappyPack 是用来处理一类特定的文件</span>
    <span class="token literal-property property">id</span><span class="token operator">:</span> <span class="token string">'babel'</span><span class="token punctuation">,</span>
    <span class="token comment">// 如何处理 .js 文件，用法和 Loader 配置中一样</span>
    <span class="token literal-property property">loaders</span><span class="token operator">:</span> <span class="token punctuation">[</span><span class="token string">'babel-loader?cacheDirectory'</span><span class="token punctuation">]</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br></div></div><h3 id="paralleluglifyplugin-多进程压缩js"><a href="#paralleluglifyplugin-多进程压缩js" class="header-anchor">#</a> ParallelUglifyPlugin 多进程压缩JS</h3> <ul><li>webpack 内置 Uglify 工具压缩 JS</li> <li>JS单线程，开启多进程压缩更快</li> <li>和 happyPack 同理</li></ul> <div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token comment">// plugins</span>

<span class="token comment">// 使用 ParallelUglifyPlugin 并行压缩输出的 JS 代码</span>
<span class="token keyword">new</span> <span class="token class-name">ParallelUglifyPlugin</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    <span class="token comment">// 传递给 UglifyJS 的参数</span>
    <span class="token comment">// （还是使用 UglifyJS 压缩，只不过帮助开启了多进程）</span>
    <span class="token literal-property property">uglifyJS</span><span class="token operator">:</span> <span class="token punctuation">{</span>
        <span class="token literal-property property">output</span><span class="token operator">:</span> <span class="token punctuation">{</span>
            <span class="token literal-property property">beautify</span><span class="token operator">:</span> <span class="token boolean">false</span><span class="token punctuation">,</span> <span class="token comment">// 最紧凑的输出</span>
            <span class="token literal-property property">comments</span><span class="token operator">:</span> <span class="token boolean">false</span><span class="token punctuation">,</span> <span class="token comment">// 删除所有的注释</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>
        <span class="token literal-property property">compress</span><span class="token operator">:</span> <span class="token punctuation">{</span>
            <span class="token comment">// 删除所有的 `console` 语句，可以兼容ie浏览器</span>
            <span class="token literal-property property">drop_console</span><span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
            <span class="token comment">// 内嵌定义了但是只用到一次的变量</span>
            <span class="token literal-property property">collapse_vars</span><span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
            <span class="token comment">// 提取出出现多次但是没有定义成变量去引用的静态值</span>
            <span class="token literal-property property">reduce_vars</span><span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
        <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br></div></div><hr> <p>开发环境下</p> <h3 id="自动刷新-热更新"><a href="#自动刷新-热更新" class="header-anchor">#</a> 自动刷新 热更新</h3> <p>热更新需要开启监听范围</p> <div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token comment">// 增加，开启热更新之后的代码逻辑</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>module<span class="token punctuation">.</span>hot<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    module<span class="token punctuation">.</span>hot<span class="token punctuation">.</span><span class="token function">accept</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token string">'./math'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
        <span class="token keyword">const</span> sumRes <span class="token operator">=</span> <span class="token function">sum</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">,</span> <span class="token number">30</span><span class="token punctuation">)</span>
        console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'sumRes in hot'</span><span class="token punctuation">,</span> sumRes<span class="token punctuation">)</span>
    <span class="token punctuation">}</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><h3 id="dllplugin-动态链接库插件"><a href="#dllplugin-动态链接库插件" class="header-anchor">#</a> DllPlugin 动态链接库插件</h3> <ul><li><p>前端框架如 vue React，体积大，构建慢</p></li> <li><p>较稳定，不常升级版本</p></li> <li><p>同一个版本只构建一次即可，不用每次都重新构建</p></li> <li><p>webpack 已内置 DllPlugin 支持</p></li> <li><p>DlPlugin -打包出dll文件</p> <p>react.dll.js</p> <p>manifest.json // 索引文件</p></li> <li><p>DlIlReferencePlugin - 使用 dlll文件</p></li></ul> <p>​		index.html 中引入react.dll.js文件</p> <p>​		然后配置索引地址</p> <div class="language-js line-numbers-mode"><pre class="language-js"><code>plugins

<span class="token keyword">new</span> <span class="token class-name">DllPlugin</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
      <span class="token comment">// 动态链接库的全局变量名称，需要和 output.library 中保持一致</span>
      <span class="token comment">// 该字段的值也就是输出的 manifest.json 文件 中 name 字段的值</span>
      <span class="token comment">// 例如 react.manifest.json 中就有 &quot;name&quot;: &quot;_dll_react&quot;</span>
      <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'_dll_[name]'</span><span class="token punctuation">,</span>
      <span class="token comment">// 描述动态链接库的 manifest.json 文件输出时的文件名称</span>
      <span class="token literal-property property">path</span><span class="token operator">:</span> path<span class="token punctuation">.</span><span class="token function">join</span><span class="token punctuation">(</span>distPath<span class="token punctuation">,</span> <span class="token string">'[name].manifest.json'</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
    <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br></div></div><p><strong>使用</strong>: 创建webpack.dll.js</p> <div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token keyword">const</span> path <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">'path'</span><span class="token punctuation">)</span>
<span class="token keyword">const</span> DllPlugin <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">'webpack/lib/DllPlugin'</span><span class="token punctuation">)</span>
<span class="token keyword">const</span> <span class="token punctuation">{</span> srcPath<span class="token punctuation">,</span> distPath <span class="token punctuation">}</span> <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">'./paths'</span><span class="token punctuation">)</span>

module<span class="token punctuation">.</span>exports <span class="token operator">=</span> <span class="token punctuation">{</span>
  <span class="token literal-property property">mode</span><span class="token operator">:</span> <span class="token string">'development'</span><span class="token punctuation">,</span>
  <span class="token comment">// JS 执行入口文件</span>
  <span class="token literal-property property">entry</span><span class="token operator">:</span> <span class="token punctuation">{</span>
    <span class="token comment">// 把 React 相关模块的放到一个单独的动态链接库</span>
    <span class="token literal-property property">react</span><span class="token operator">:</span> <span class="token punctuation">[</span><span class="token string">'react'</span><span class="token punctuation">,</span> <span class="token string">'react-dom'</span><span class="token punctuation">]</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token literal-property property">output</span><span class="token operator">:</span> <span class="token punctuation">{</span>
    <span class="token comment">// 输出的动态链接库的文件名称，[name] 代表当前动态链接库的名称，</span>
    <span class="token comment">// 也就是 entry 中配置的 react 和 polyfill</span>
    <span class="token literal-property property">filename</span><span class="token operator">:</span> <span class="token string">'[name].dll.js'</span><span class="token punctuation">,</span>
    <span class="token comment">// 输出的文件都放到 dist 目录下</span>
    <span class="token literal-property property">path</span><span class="token operator">:</span> distPath<span class="token punctuation">,</span>
    <span class="token comment">// 存放动态链接库的全局变量名称，例如对应 react 来说就是 _dll_react</span>
    <span class="token comment">// 之所以在前面加上 _dll_ 是为了防止全局变量冲突</span>
    <span class="token literal-property property">library</span><span class="token operator">:</span> <span class="token string">'_dll_[name]'</span><span class="token punctuation">,</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token literal-property property">plugins</span><span class="token operator">:</span> <span class="token punctuation">[</span>
    <span class="token comment">// 接入 DllPlugin</span>
    <span class="token keyword">new</span> <span class="token class-name">DllPlugin</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
      <span class="token comment">// 动态链接库的全局变量名称，需要和 output.library 中保持一致</span>
      <span class="token comment">// 该字段的值也就是输出的 manifest.json 文件 中 name 字段的值</span>
      <span class="token comment">// 例如 react.manifest.json 中就有 &quot;name&quot;: &quot;_dll_react&quot;</span>
      <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'_dll_[name]'</span><span class="token punctuation">,</span>
      <span class="token comment">// 描述动态链接库的 manifest.json 文件输出时的文件名称</span>
      <span class="token literal-property property">path</span><span class="token operator">:</span> path<span class="token punctuation">.</span><span class="token function">join</span><span class="token punctuation">(</span>distPath<span class="token punctuation">,</span> <span class="token string">'[name].manifest.json'</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
    <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
  <span class="token punctuation">]</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br></div></div><h2 id="webpack-性能优化-产出代码"><a href="#webpack-性能优化-产出代码" class="header-anchor">#</a> webpack 性能优化 - 产出代码</h2> <ul><li><p>体积更小</p></li> <li><p>合理分包，不重复加载</p></li> <li><p>速度更快、内存使用更少</p></li> <li><p>小图片 base64 编码</p></li> <li><p>bundle 加 hash</p></li> <li><p>懒加载</p></li> <li><p>提取公共代码</p></li> <li><p>IngorePlugin</p></li> <li><p>使用cdn 加速</p> <ul><li>publicPath</li></ul></li> <li><p>使用 production</p> <ul><li>更改mode配置 ， production会自动压缩代码</li> <li>Vue React 等会自动删掉调试代码（如开发环境的 warning）</li> <li>启动 Tree-Shaking</li></ul></li> <li><p>Scope Hosting</p> <ul><li>代码体积更小</li> <li>创建函数作用域更少</li> <li>代码可读性更好</li> <li><img src="https://cdn.jsdelivr.net/gh/izhaong/izhaong.com-oss/blogImg/%E9%AB%98%E7%BA%A7%E4%BD%BF%E7%94%A8/2022/06/10/19-34-19-d2f4b06bdd3523c4529c3e4c7d60e86a-image-20220610193408856-d35c99.png" alt="image-20220610193408856"></li></ul></li></ul> <h2 id="es6-module-和-commonjs-区别"><a href="#es6-module-和-commonjs-区别" class="header-anchor">#</a> ES6 Module 和 Commonjs 区别</h2> <p>两个都是模块化解决方案</p> <ul><li>ES6 Module 静态引入，编译时引入</li> <li>Commonjs 动态引入，执行时引入</li> <li>只有 ES6 Module 才能静态分析，实现 Tree-Shaking</li></ul></div></div>  <div class="page-edit"><!----> <!----> <div class="last-updated"><span class="prefix">上次更新:</span> <span class="time">2023/09/17, 16:36:29</span></div></div> <div class="page-nav-wapper"><div class="page-nav-centre-wrap"><a href="/pages/d1a534/" class="page-nav-centre page-nav-centre-prev"><div class="tooltip">自制脚手架</div></a> <a href="/pages/890104/" class="page-nav-centre page-nav-centre-next"><div class="tooltip">babel</div></a></div> <div class="page-nav"><p class="inner"><span class="prev">
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